Antiphase domain

M. Porta, C. Frontera, F. Vives, T. Castan. Effect of the vacancy interaction on antiphase domain growth in a two-dimensional binary alloy. Phys Rev B 56 5261, 1997. 

Comparison of Ordering After Quenching from above T, with Order-Order Relaxations The Influence of Antiphase Domain Growth... 

R.W Cahn, Antiphase domains, disordered films and the ductility of ordered alloys based on Ni3 Al, Mai. Res. Soc. Symp. Proc. 81 27 (1987)... 

A special type of modulated superstructure (long-period superstructure) is known for AuCu (AuCul) and results in the oI40-AuCu (II) type. This antiphase-domain structure has been discussed in 3.11.1 (Fig. 3.41). 

From LEED measurements of H monolayers adsorbed on Fe(110) Imbihl et al. proposed a phase diagram as shown in Fig. IS. In addition to lattice gas and lattice fluid phases, two commensurate ordered phases were identifled, denoted as (2 x 1) and (3 x 1) in the figure (cf. Fig. 16). The shaded regions are interpreted as incommensurate phases or as phases composed of antiphase domains their signature is that the LEED spot does not occur at the Bragg position but rather the peak is splitted and satellites appear (Fig. 17). 

Fig. IS. Phase diagram of the H/Fe(110) system, as detenniiied from LEED intensities. Fuli dots represent experimentally determined data points shaded areas correspond to incommensurate or antiphase domain regions. A possible interpretation for the ordered (2 x 1) and (3 x 1) phases is indicated in Fig. 16, assuming that the adsorption sites form a centered rectangular lattice as shown in Fig. lb. (From Imbihl et...

FIG. 65. Antiphase domain formation in polar on nonpolar epitaxy (a) incomplete prelayer coverage, (b) odd step height. (From Ref. 387.)... 

Y. Takahashi and H. Tadokoro. Short-range order in form II of poly(vinylidene fluoride) antiphase domain structures , Macromolecules 16, 1880 (1983). 

The development of the miscibility gap for W < 0 and the antiphases ( Tjeq) for W > 0 have entirely different kinetic implications. For decomposition, mass flux is necessary for the evolution of two phases with differing compositions. Furthermore, interfaces between these two phases necessarily develop. The evolution of ordered phases from disordered phases (i.e., the onset of nonzero structural order parameters) can occur with no mass flux macroscopic diffusion is not necessary. Because the 77+q-phase is thermodynamically equivalent to the 7/iq-phase, the development of 77+q-phase in one material location is simultaneous with the evolution of r lq-phase at another location. The impingement of these two phases creates an antiphase domain boundary. These interfaces are regions of local heterogeneity and increase the free energy above the homogeneous value given by Eq. 17.14. The kinetic implications of macroscopic diffusion and of the development of interfaces are treated in Chapter 18. 

S.M. Allen and J.W. Cahn. Microscopic theory for antiphase boundary motion and its application to antiphase domain coarsening. Acta Metall., 27(6) 1085-1095, 1979. 

Long-range order domains may be nucleated at several places within a grain. When the domains grow together, a boundary will be formed if the domains are out of phase. Figure 8.3 illustrated such an antiphase domain boundary. The... 

Keywords interstitial solid solutions, crystal structure, phase transformation, order-disorder, isotopic effect, antiphase domains, neutron diffraction, TiN026Hoi5, TiN026Doi5, TiN0.MH0.075D0.075 ... 

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